I am curious. Would the battery savings on a eink reader justify buying an eink reader ?

teotjunk

Not financially IMO. It is the convenience off not having to charge as often that is the advantage of eink devices.

I live in a household with a desktop, 3 laptops, 3 tablets, a large upright freezer and many, many other electronic devices turned on most of the day/night. My power bill is usually around $45 or$1.50 a day, so I doubt charging practically anything eink or LCD costs more than a few cents.